its not clear realy is it as the out from the tunner could be the out from the rig or the in from the rig,depends how you look at it!,the issue is mine is fitted into an old aluminium ebike brushless motor controller case with an endcap with 2x so 239 connectors on it,,a cap blewup on it so had to pull it apart to fit a new cap,the 239's were marked but its possible to fit the endcap they are on upside down so in effect reversing my markings of ant and rig,i dont understand why the pcb is marked in and out,ant and radio would be more clear!.,i am still no nearer to finding a definitive answer then.73.